before returning to Rochester on August 22, 2012, for the final two weeks of the International League season. In two starts at the end of the season, Gibson went 0–2 with a 9.45 ERA, striking out 10 batters in innings. He continued his rehabilitation process in the Arizona Fall League, where he finished 3–2 with a 5.40 ERA, striking out 28 batters and allowing 31 hits in innings. Gibson opened the 2013 season in Rochester, with Twins management anticipating that he would make his MLB debut sometime that season. Minnesota Twins The Twins called Gibson up to the major leagues on June 25, 2013, after starting pitcher Mike Pelfrey suffered a back injury that placed him on the disabled list. At the time, he was the ninth pitcher to start a game for Minnesota during the 2013 MLB season, and his promotion offered a path to remain in the majors for the remainder of the year. Gibson was credited with the win in his MLB debut, allowing two runs and eight hits while striking out five batters in six innings on June 29. The Twins defeated the Kansas City Royals 6–2. His success did not continue past that debut, as Gibson struggled to strike out batters in his future starts. After posting a 2–4 record and a 6.53 ERA with 29 strikeouts in 10 starts and 51 innings, Gibson was optioned back to Rochester on August 19. In his final major league start of the season, he gave up four runs on 10 hits in only innings. While he was sent back to Triple A to work on his pitch command, Twins manager Ron Gardenhire took the time to analyze how many innings Gibson had already pitched and to develop a plan for the remainder of the season. He was shut down for the season on September 2, after pitching a combined innings between Rochester and Minnesota, with the expectation that he would compete for a Twins starting rotation position the following spring. The Twins spent the 2013–14 offseason retooling their pitching rotation, spending approximately $84 million on signing new pitchers during the free agency period and giving Gibson an upwards battle for a major league position on opening day. He proceeded to outbattle Scott Diamond, Vance Worley, and Samuel Deduno during spring training, posting a 2.70 ERA in four starts. Gibson was named the No. 5 starter, while Deduno